diff --git a/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.h b/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.h
index 5344e3c1cace9..cd8d35f026d0d 100644
--- a/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.h
+++ b/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.h
@@ -6,12 +6,6 @@
 // Status LED
 #define MICROPY_HW_LED_STATUS (&pin_PA23)
 
-// On-board flash
-#define SPI_FLASH_MOSI_PIN &pin_PA09
-#define SPI_FLASH_MISO_PIN &pin_PA10
-#define SPI_FLASH_SCK_PIN  &pin_PA08
-#define SPI_FLASH_CS_PIN   &pin_PA11
-
 #define BOARD_HAS_CRYSTAL 1
 
 #define DEFAULT_I2C_BUS_SCL (&pin_PA16)
diff --git a/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.mk b/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.mk
index 3ae3d8f5a9070..8318bbf719b0f 100644
--- a/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/sparkfun_samd51_micromod/mpconfigboard.mk
@@ -7,8 +7,6 @@ USB_MANUFACTURER = "SparkFun Electronics"
 CHIP_VARIANT = SAMD51J20A
 CHIP_FAMILY = samd51
 
-SPI_FLASH_FILESYSTEM = 1
-EXTERNAL_FLASH_DEVICES = W25Q128JVxM
-LONGINT_IMPL = MPZ
-
-CIRCUITPY_PS2IO = 1
+INTERNAL_FLASH_FILESYSTEM = 1
+LONGINT_IMPL = 0
+CIRCUITPY_FULL_BUILD = 0